BMC oral health
Clinical and radiographic outcomes of second molars with external root resorption following impacted third molar removal: a retrospective CBCT-based cohort study
By Yao B, Qiu S, Wang C and 2 others.
Abstract
Objective
To evaluate the clinical and radiographic outcomes of second molars (M2s) affected by external root resorption (ERR) following impacted third molar (M3) removal, and to assess the influence of adjunctive guided bone regeneration (GBR).
Methods
This retrospective cohort study included patients presenting with ERR of M2s associated with impacted M3s who underwent M3 extraction with or without concurrent GBR. Cone-beam computed tomography (CBCT) was used to assess ERR progression and distal alveolar bone levels before surgery and at least 6 months postoperatively. Pulp sensibility was also evaluated. Changes in distal bone height were compared between groups. Generalized estimating equations (GEE) were used to evaluate the association between treatment modality and bone gain while adjusting for baseline defect severity and potential confounders. Interaction analysis was performed to assess whether the effect of GBR varied according to baseline defect severity.
